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{ config, pkgs, ... }:
with pkgs.lib;
{
options = {
system.nixosVersion = mkOption {
type = types.uniq types.string;
description = "NixOS version.";
};
system.nixosVersionSuffix = mkOption {
type = types.uniq types.string;
description = "NixOS version suffix.";
};
system.nixosCodeName = mkOption {
type = types.uniq types.string;
description = "NixOS release code name.";
};
};
config = {
system.nixosVersion =
mkDefault (builtins.readFile ../../.version + config.system.nixosVersionSuffix);
system.nixosVersionSuffix =
mkDefault (if builtins.pathExists ../../.version-suffix then builtins.readFile ../../.version-suffix else "pre-git");
# Note: code names must only increase in alphabetical order.
system.nixosCodeName = "Aardvark";
# Generate /etc/os-release. See
# http://0pointer.de/public/systemd-man/os-release.html for the
# format.
environment.etc = singleton
{ source = pkgs.writeText "os-release"
''
NAME=NixOS
ID=nixos
VERSION="${config.system.nixosVersion} (${config.system.nixosCodeName})"
VERSION_ID="${config.system.nixosVersion}"
PRETTY_NAME="NixOS ${config.system.nixosVersion} (${config.system.nixosCodeName})"
HOME_URL="http://nixos.org/"
'';
target = "os-release";
};
};
}
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